fix stella issue

Signed-off-by: Deborah Dahl <dahl@conversational-technologies.com>

Author: dadahl

stella/.gitignore

@@ -1 +1,3 @@
 .vercel
+.env
+.env.*

stella/nasa.py

@@ -1,7 +1,8 @@
 import requests
+import os
 
 # NASA API Key
-nasa_api_key = wVnaajaqfHQIaOhSyc5SQWFecweOwKAe54OUSuZT
+nasa_api_key = os.getenv("NASA_API_KEY", "DEMO_KEY")
 
 # Construct the GET request URL
 nasa_url = f"https://api.nasa.gov/planetary/apod?api_key={nasa_api_key}"

stella/nasa_api.py

@@ -1,10 +1,12 @@
 import requests
 import re
+import os
 from typing import Optional
 
 # Parameters for the request
 params = {
-    "api_key": "wVnaajaqfHQIaOhSyc5SQWFecweOwKAe54OUSuZT",       # Replace with your own key from https://api.nasa.gov
+    # Use env var if provided; DEMO_KEY avoids hardcoding secrets in source.
+    "api_key": os.getenv("NASA_API_KEY", "DEMO_KEY"),
     "hd": True                   # Optional: True to get HD image URL
 }